| Digit | Number.Positional |
| Dimension | Number.SI.Unit |
| Div | Number.OccasionallyScalarExpression |
| Divisible | Number.Complex |
| Double | NumericPrelude, MyPrelude |
| dataRate | Number.SI.Unit |
| database | Number.SI.Unit |
| databaseRead | Number.SI.Unit |
| databaseShow | Number.SI.Unit |
| day | Number.SI |
| daySecs | Number.SI.Unit |
| deca | Number.SI.Unit |
| deci | Number.SI.Unit |
| decompose | Number.Physical.UnitDatabase |
| decomposeVarPositional | Algebra.IntegralDomain |
| decomposeVarPositionalInf | Algebra.IntegralDomain |
| decreaseExp | Number.Positional |
| decreaseExpFP | Number.Positional |
| defScale | Number.Physical.Show |
| defScaleIx | Number.Physical.UnitDatabase |
| defltBase | Number.Positional.Check |
| defltBaseExp | Number.Positional.Check |
| defltBaseRoot | Number.Positional.Check |
| defltDenominator | Number.FixedPoint.Check |
| defltDiv | Number.Complex |
| defltIsZero | Algebra.ZeroTestable |
| defltMagnitude | Number.Complex |
| defltPhase | Number.Complex |
| defltPow | Number.Complex |
| defltShow |
| 1 (Function) | Number.FixedPoint.Check |
| 2 (Function) | Number.Positional.Check |
| deg180 | Number.SI.Unit |
| denominator |
| 1 (Function) | Number.FixedPoint.Check |
| 2 (Function) | Number.Ratio, NumericPrelude, MyPrelude |
| derivedLog | MathObj.PowerSeries |
| diffComp | MathObj.PowerSeries.Mean |
| differentiate |
| 1 (Function) | Algebra.Differential |
| 2 (Function) | MathObj.Polynomial |
| 3 (Function) | MathObj.PowerSeries |
| differentiate0 | MathObj.PowerSeries2 |
| differentiate1 | MathObj.PowerSeries2 |
| dimension |
| 1 (Function) | Algebra.ModuleBasis |
| 2 (Function) | MathObj.Matrix |
| diophantine | Algebra.PrincipalIdealDomain |
| diophantineMin | Algebra.PrincipalIdealDomain |
| diophantineMulti | Algebra.PrincipalIdealDomain |
| distLE | Number.Physical.UnitDatabase |
| distance | Number.SI.Unit |
| distances | Number.Physical.UnitDatabase |
| div |
| 1 (Function) | Algebra.IntegralDomain, NumericPrelude, MyPrelude |
| 2 (Function) | MathObj.LaurentPolynomial |
| divExample | MathObj.LaurentPolynomial |
| divInt | Number.Positional |
| divIntMant | Number.Positional |
| divIntMantInf | Number.Positional |
| divMant | Number.Positional |
| divMantSlow | Number.Positional |
| divMod |
| 1 (Function) | Algebra.IntegralDomain, NumericPrelude, MyPrelude |
| 2 (Function) | MathObj.Polynomial |
| 3 (Function) | MathObj.PowerSeries |
| divModZero | Algebra.IntegralDomain |
| divOneFlip | MathObj.PowerSum |
| divide |
| 1 (Function) | MathObj.PowerSeries |
| 2 (Function) | MathObj.PowerSeries2 |
| 3 (Function) | Number.Complex |
| 4 (Function) | Number.FixedPoint |
| 5 (Function) | Number.Positional |
| 6 (Function) | Number.ResidueClass |
| divideMaybe | Number.ResidueClass |
| divideStripZero | MathObj.PowerSeries |
| divides | Algebra.IntegralDomain, NumericPrelude, MyPrelude |
| dn | Algebra.Lattice |
| domain | MathObj.Permutation |
| drop | PreludeBase, MyPrelude |
| dropWhile | PreludeBase, MyPrelude |
| dropWhileRev | NumericPrelude.List |
